包钢链-回-环工艺球团配加细磨超特粉试验研究  

Experimental Study on Pellets with Addition of Finely Ground Super Special Powder in Process of Traveling Grate-Rotary Kiln-Rotating Annular Cooler of Baotou Steel

作　　者：付国伟[1] 吕志义[1] 白晓光[1] Fu Guo-wei;Lv Zhi-yi;Bai Xiao-guang(Technical Center of Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 014010,Inner Mongolia Autonomous Region,China)

机构地区：[1]内蒙古包钢钢联股份有限公司技术中心,内蒙古包头014010

出　　处：《包钢科技》2023年第5期16-21,共6页Science & Technology of Baotou Steel

摘　　要：文章以包钢链篦机-回转窑-环冷机工艺生产酸性球团矿原料配置为基础,系统考察了细磨超特粉替代区内铁精矿对球团矿生产过程及球团矿性能的影响。同时,基于细磨超特粉低硫的特点,探索了巴润精矿在球团矿生产中最大配比。结果表明,包钢球团配加细磨超特粉有明显降低膨润土配比的作用,当细磨超特粉配比为10%时,膨润土配比可由2.0%降低至1.2%,降低幅度较大。细磨超特粉配比为5%~20%时,生球、干球性能指标均可满足球团矿生产需求。焙烧温度为1220~1240℃条件下,不同细磨超特粉配比下制备的成品氧化球团矿抗压强度均达到2500 N以上,还原膨胀率低于20%,满足高炉生产要求。兼顾球团矿品位及Al_(2)O_(3)含量,建议链篦机-回转窑-环冷机工艺生产球团铁料配置为10%细磨超特粉+50%~60%巴润精矿+30%~40%区内精矿。在细磨超特粉配比为10%、膨润土配比为1.2%原料条件下,巴润精矿最大配比可达60%。In this paper,the effects of replacing iron ore concentrate of Inner Mongolia Autonomous Region with finely ground super special powder on production process and properties of pellet are systematically investigated based on the configuration of raw materials of producing acid pellet with the process of traveling grate-rotary kiln-rotating annular cooler of Baotou Steel.Meanwhile,the maximum proportion of Barun concentrate in producing pellet is explored based on the characteristics of low sulfur for finely ground super special powder.The results showed that the proportion of bentonite could be reduced obviously by adding the finely ground super special powder into pellet of Baotou Steel.When the proportion of finely ground super special powder is 10%,proportion of bentonite could be reduced from 2.0%to 1.2%,which is a significant reduction.When the proportion of finely ground super special powder is 5%~20%,performance indexes of green pellets and dry pellets could all meet production requirements of pellets.Under the condition of calcination temperature of 1220~1240℃,the compressive strengths of finished product,oxidized pellets prepared with different proportions of finely ground super special powder all reach over 2500 N and reduction swelling rate is lower than 20%,which could meet the requirements of blast furnace production.It is suggested to produce pellets with the configuration of iron charge of 10%finely ground super special powder+50%~60%Barun concentrate+30%~40%iron ore concentrate of Inner Mongolia Autonomous Region for the process of traveling grate-rotary kiln-rotating annular cooler considering the grade of pellets and content of Al_(2)O_(3).Under the raw material condition of 10%finely ground super special powder and 1.2%bentonite,the maximum proportion of Barun concentrate could reach 60%.

关 键 词：细磨超特粉 酸性氧化球团矿 球团矿性能 铁料配置 

分 类 号：TF046[冶金工程—冶金物理化学]